Time Travel & Causality in General Relativity

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SUMMARY

The discussion centers on the implications of time travel within the framework of General Relativity, specifically regarding closed timelike curves (CTCs). Participants agree that while CTCs theoretically allow for time travel, they do not permit alterations to past events, as one's worldline remains consistent. The conversation highlights that possessing memories of future events does not equate to changing the past, as these memories are inherently part of the time traveler's history. Ultimately, the consensus is that time travel, as described by CTCs, challenges the notion of free will and causality.

PREREQUISITES
  • Understanding of General Relativity principles
  • Familiarity with closed timelike curves (CTCs)
  • Knowledge of causality in physics
  • Basic grasp of worldlines in spacetime
NEXT STEPS
  • Research the implications of closed timelike curves in theoretical physics
  • Explore Kip Thorne's "Black Holes and Time Warps" for insights on CTCs and wormholes
  • Study the Novikov self-consistency principle and its applications
  • Investigate the philosophical implications of time travel on free will and determinism
USEFUL FOR

Physicists, philosophers, and anyone interested in the theoretical aspects of time travel and its implications on causality and free will.

  • #31
TheQuestionGuy14 said:
would it be a very weird experience if this occurred?

I would expect so, yes. :wink:

TheQuestionGuy14 said:
Would our memories mess up or something?

I've already addressed this in previous posts. At any point on your worldline, your state is what it is, and it can contain information about the state at other points on your worldline. Whether this fits our intuitive notion of "memory" is not a question of physics but of terminology.
 

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